foo.c: In function 'main':
foo.c:9:20: error: expected ',' or ';' before ':' token
    9 |         for(int i=0:i<a;i++){
      |                    ^
foo.c:9:28: error: expected ';' before ')' token
    9 |         for(int i=0:i<a;i++){
      |                            ^
      |                            ;
foo.c:12:23: error: expected ';' before 'return'
   12 |         printf("%d",c)
      |                       ^
      |                       ;
......
   15 | return 0;
      | ~~~~~~                 

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